New Double Lens Folding Magnifier 10X. This is a new double lens folding magnifier. Both lenses are 5X and you can combine the two for a total of 10X power. The powerful magnification may help reduce eye strain. It is convenient for your home, office and travel. Enlarges fine print in books, maps, newspapers, directories, legal documents, etc. The 5X lens has a 2" (51 mm) focal distance and the 10X has a 1" (25 mm) focal distance. It measures approximately 3 5/8" x 1 11/16" (92 x 43 mm) open and about 2 1/8" x 1 11/16" (54 x 43 mm) closed.